package cn.feng.thinkInJava.a9_3_容器.containers.a17_03_00;

//: containers/CollectionMethods.java
// Things you can do with all Collections.
import java.util.*;
import net.mindview.util.*;
import static net.mindview.util.Print.*;

/**
 * Collection的功能方法
 * 
 * @author fengyu
 * @date 2015年8月9日
 */
public class CollectionMethods
{
	public static void main(String[] args)
	{
		Collection<String> c=new ArrayList<String>();
		c.addAll(Countries.names(6));
		c.add("ten");
		c.add("eleven");
		print(c);
		// Make an array from the List:
		Object[] array=c.toArray();
		// Make a String array from the List:
		String[] str=c.toArray(new String[0]);
		// Find max and min elements; this means
		// different things depending on the way
		// the Comparable interface is implemented:
		print("Collections.max(c) = "+Collections.max(c));
		print("Collections.min(c) = "+Collections.min(c));
		// Add a Collection to another Collection
		Collection<String> c2=new ArrayList<String>();
		c2.addAll(Countries.names(6));
		c.addAll(c2);
		print(c);
		c.remove(Countries.DATA[0][0]);
		print(c);
		c.remove(Countries.DATA[1][0]);
		print(c);
		// Remove all components that are
		// in the argument collection:
		c.removeAll(c2);
		print(c);
		c.addAll(c2);
		print(c);
		// Is an element in this Collection?
		String val=Countries.DATA[3][0];
		print("c.contains("+val+") = "+c.contains(val));
		// Is a Collection in this Collection?
		print("c.containsAll(c2) = "+c.containsAll(c2));
		Collection<String> c3=((List<String>)c).subList(3,5);
		// Keep all the elements that are in both
		// c2 and c3 (an intersection of sets):
		c2.retainAll(c3);
		print(c2);
		// Throw away all the elements
		// in c2 that also appear in c3:
		c2.removeAll(c3);
		print("c2.isEmpty() = "+c2.isEmpty());
		c=new ArrayList<String>();
		c.addAll(Countries.names(6));
		print(c);
		c.clear(); // Remove all element
		print("after c.clear():"+c);
	}
} /* Output:
[ALGERIA, ANGOLA, BENIN, BOTSWANA, BULGARIA, BURKINA FASO, ten, eleven]
Collections.max(c) = ten
Collections.min(c) = ALGERIA
[ALGERIA, ANGOLA, BENIN, BOTSWANA, BULGARIA, BURKINA FASO, ten, eleven, ALGERIA, ANGOLA, BENIN, BOTSWANA, BULGARIA, BURKINA FASO]
[ANGOLA, BENIN, BOTSWANA, BULGARIA, BURKINA FASO, ten, eleven, ALGERIA, ANGOLA, BENIN, BOTSWANA, BULGARIA, BURKINA FASO]
[BENIN, BOTSWANA, BULGARIA, BURKINA FASO, ten, eleven, ALGERIA, ANGOLA, BENIN, BOTSWANA, BULGARIA, BURKINA FASO]
[ten, eleven]
[ten, eleven, ALGERIA, ANGOLA, BENIN, BOTSWANA, BULGARIA, BURKINA FASO]
c.contains(BOTSWANA) = true
c.containsAll(c2) = true
[ANGOLA, BENIN]
c2.isEmpty() = true
[ALGERIA, ANGOLA, BENIN, BOTSWANA, BULGARIA, BURKINA FASO]
after c.clear():[]
*///:~
